HEK293T cells were plated at 60% confluence in a 12-well and 16 h later transfected with 1 µg of editor expression vector and 0.5 µg LRT2B plasmid containing gRNA of interest in 100 µl DMEM using a 1:3 DNA:PEI ratio. Cells were washed 12 h later in complete media. Cells were assayed and collected 2–7 days post-transfection. For PE3, 0.5 µg of nicking gRNA in LRT2B was transfected 24 h after the primary transfection.
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